

ABSTRACT

HERETOFORE WASTE RUBBER, A SUBSTANTIAL AMOUNT OF IT IN THE FORM OF USED AUTOMOBILE TIRES, HAS BEEN BURIED, BURNED, OR OTHERWISE DSPOSED OF IN MANNERS AND BY MEANS TOTALLY INCONSISTENT WITH GOOD ECOLOGICAL PRACTICES AND CONSIDERATIONS, BOW, SUCH WASTE OR SCRAP RUBBER, BOTH NATURAL AND SYNTHETIC, CAN READILY BE CONVERTED IN THE PRESENCE OF MOLTEN ACIDIC HALIDE LEWIS SALT CATALYSTS TO USEFUL PRODUCTS, INCLUDING FUELS COMPRISING A NAPHTTHA-LIKE OIL, A BURNABLE SOLID CARBONACEOUS MATERIAL, AND A MIXTURE OF GASSES. THE MOST PROMISING SALTS ARE ZINC CHLORIDE, TIN CHLORIDE, AND ANTIMONY OIDIDE, ALSO AN EXTREMELY ACTIVE CATALYST CAN BE PREPARED BY ADDING UP TO ABOUT 60 PERCENT BY WEIGHT OF SODIUM CHLORIDE TO THE ZINC CHLORIDE CATALYST. THE BURNABLE CARBONACEOUS MATERIAL HAS BEEN SHOWN TO BE A CARBON BLACK OF MODERATE QUALITY AND IS BELIEVED TO BE SUITABLFE FOR REUSE IN TIRES IF BLENDED WITH HIGH-QUALITY FRESH CARBON BLACK.

UEFENSlVE PUBLIQATiUN UNITED STATES PATENT AND TRADEMARK OFFICEPublished at the request of the applicant crowns: in accordance with theNotice of Dec. 16, 1969, 369 O.G 687. The abstracts of DefensivePublication applications are identified by distinctly numbered seriesand are arranged chronologically. The heading of each abstract indicatesthe number of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been ex mined to the meritsof alleged invention. The Patent and Trademark Ofiice makes no assertionas to the novelty of the disclosed subject matter.

PUBLISHED NOVEMBER l, 1975 T940307 CONVERSION OF WASTE RUBBER TO FUELAND OTHER USEFUL PRODUCTS John W. Larsen, Rte. 3, Joe Lewis Road,Knoxville, Tenn. 37%0 Filed May 17, 1974, Scr. No. 476,862 Int. Cl. C10]5/48 U.S. Cl. 44--l D No Drawing. 14 Pages Specification Herctoforewaste rubber, a substantial amount of it in the form of used automobiletires, has been buried, burned, or otherwise disposed of in manners andby means totally inconsistent with good ecological practices andconsiderations. Now, such waste or scrap rubber, both natural andsynthetic, can readily be converted in the presence of molten acidichalide Lewis salt catalysts to useful products, including fuelscomprising a naphttha-like oil, a burnablc solid carbonaceous material,and a mixture of gases. The most promising salts are zinc chloride, tinchloride, and antimony iodide. Also, an extremely active catalyst can beprepared by adding up to about 60 percent by weight of sodium chlorideto the zinc chlo ride catalyst. The burnable carbonaceous material hasbeen shown to be a carbon black of moderate quality and is believed tobe suitable for reuse in tires if blended with high-quality fresh carbonblack.

